Milling is the machining process of using rotary cutters to remove material{{#invoke:Footnotes|sfn}} from a workpiece advancing (or feeding) in a direction at an angle with the axis of the tool. {{#invoke:Footnotes|sfn}}{{#invoke:Footnotes|sfn}} It covers a wide variety of different operations and machines, on scales from small individual parts to large, heavy-duty gang milling operations.